Grundfos CM series, Service Instructions Manual

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8. Fit spring (pos. 108) and driver (pos. 112).
TM044326
Fitting the spring and driver
9. Fit short spacing pipe (pos. 64a), impeller (pos. 49), gasket
(pos. 139c) and chamber (pos. 4g).
10. Fit gasket (pos. 139b), spacing pipe (pos. 64), impeller (pos. 49)
and chamber (pos. 4).
11. Continue the assembly until clamp (pos. 64c). For correct fitting
of chambers and impellers, see the section on order of
assembly for chambers and impellers.
12. Fit impeller (pos. 49), clamp (pos. 64c), washers (pos. 66) and
nut (pos. 67).
TM021057
Correct fitting of washers
13. Hold clamp (pos. 64c), and tighten nut (pos. 67). See the
section on tightening torques and lubricants.
14. Fit gasket (pos. 139b).
15. Fit inlet part (pos. 6).
16. Fit and cross-tighten staybolts (pos. 26). See the section on
tightening torques and lubricants.
Related information
3. Tightening torques and lubricants
5.6.2 Assembly
5.7.2 Assembly
8.1 Key for CM 1, 3, 5
5.5 CM 10, 15, 25, stainless steel
5.5.1 Dismantling
1. Remove staybolts (pos. 26).
2. Remove clamping flange (pos. 6a) and sleeve (pos. 16).
3. Remove the chamber plate (pos. 4f).
4. Hold clamp (pos. 64c), and remove nut (pos. 67).
5. Remove lock washers (pos. 66) and clamp (pos. 64c).
6. Remove impeller (pos. 49).
7. Remove spacing pipe (pos. 64e), bearing ring (pos. 47a) and
chamber for bearing (pos. 4a).
Step 7 applies only to pumps with six or more stages.
8. Continue the dismantling until shaft seal (pos. 105).
9. Remove shaft seal (pos. 105).
TM044327
Exploded view of shaft seal
10. Remove O-ring (pos. 31) and cover plate (pos. 32).
Dismantling of MG 71 and MG 80, see the section on dis-
mantling.
Dismantling of MG 90, MG 100, MG 112 and MG 132, see
the section on dismantling.
It is advisable always to replace wear rings (pos. 45) and
wear ring retainers (pos. 65). See the section on checking
and replacing impellers and chambers.
Related information
5.6.1 Dismantling
5.7.1 Dismantling
5.8 Checking and replacing impellers and chambers
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English (GB)